US8164208B2 - Systems involving multi-spool generators and variable speed electrical generators - Google Patents

Systems involving multi-spool generators and variable speed electrical generators Download PDF

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Publication number
US8164208B2
US8164208B2 US12/424,025 US42402509A US8164208B2 US 8164208 B2 US8164208 B2 US 8164208B2 US 42402509 A US42402509 A US 42402509A US 8164208 B2 US8164208 B2 US 8164208B2
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Prior art keywords
generator
spool
high pressure
operative
pressure spool
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Expired - Fee Related, expires
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US12/424,025
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English (en)
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US20100264655A1 (en
Inventor
Randy Scott Rosson
Kevin Wood Wilkes
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General Electric Co
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General Electric Co
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Priority to US12/424,025 priority Critical patent/US8164208B2/en
Assigned to GENERAL ELECTRIC COMPANY reassignment GENERAL ELECTRIC COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ROSSON, RANDY SCOTT, WILKES, KEVIN WOOD
Priority to JP2010089090A priority patent/JP2010249134A/ja
Priority to EP10159634.4A priority patent/EP2241725B1/fr
Priority to CN2010101675260A priority patent/CN101915128B/zh
Publication of US20100264655A1 publication Critical patent/US20100264655A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
    • F02C6/003—Gas-turbine plants with heaters between turbine stages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/10—Adaptations for driving, or combinations with, electric generators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C3/00—Gas-turbine plants characterised by the use of combustion products as the working fluid
    • F02C3/04—Gas-turbine plants characterised by the use of combustion products as the working fluid having a turbine driving a compressor
    • F02C3/10—Gas-turbine plants characterised by the use of combustion products as the working fluid having a turbine driving a compressor with another turbine driving an output shaft but not driving the compressor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/70—Application in combination with
    • F05D2220/72—Application in combination with a steam turbine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/70—Application in combination with
    • F05D2220/76—Application in combination with an electrical generator
    • F05D2220/764—Application in combination with an electrical generator of the alternating current (A.C.) type
    • F05D2220/7642—Application in combination with an electrical generator of the alternating current (A.C.) type of the synchronous type

Definitions

  • the subject matter disclosed herein relates to power generation particularly gas turbine power generation.
  • Single spool configurations of generators use a high pressure turbine that is connected to a compressor and a synchronous speed generator. Disadvantages of single spool configurations may include a reduction of the power capacity of the gas turbine when ambient temperature increases or when the power grid frequency decreases.
  • Two spool gas turbine generators typically use a high pressure turbine that is connected to a compressor and a low pressure turbine that is connected to a generator.
  • a disadvantage of using a two spool generator configuration is that there is a slower transient response when desired output of the generator changes.
  • a large power turbine spool may be difficult to design and fabricate.
  • a system comprises a turbine engine having a first spool connected to a compressor portion, a power turbine spool, a first generator connected to the power turbine spool, and a second generator connected to the first spool.
  • a system comprises a turbine engine having a first spool connected to a compressor portion, a power turbine spool operative to be driven by exhaust from the turbine engine, a first generator connected to the power turbine spool, and a variable speed generator connected to the first spool, operative to be driven by the first spool.
  • a method for operating a system comprises rotating a high pressure spool of a gas turbine engine with a variable speed generator, initiating combustion in a combustor of the gas turbine engine, driving the variable speed generator with the high pressure gas turbine engine and driving a low pressure spool connected to a second generator with exhaust from the gas turbine engine.
  • FIG. 1 is an exemplary embodiment of a multi-spool generator system.
  • FIG. 2 is a block diagram of an exemplary method for starting the system of FIG. 1 .
  • FIG. 3 is an alternate exemplary embodiment of the system of FIG. 1 .
  • FIG. 4 is another alternate exemplary embodiment of the system of FIG. 1 .
  • FIG. 5 is another alternate exemplary embodiment of the system of FIG. 1 .
  • FIG. 6 is another alternate exemplary embodiment of the system of FIG. 1 .
  • FIG. 7 is another alternate exemplary embodiment of the system of FIG. 1 .
  • FIG. 8 is another alternate exemplary embodiment of the system of FIG. 1 .
  • Previous systems used a synchronous speed generator that was connected to a high pressure spool via a shaft (a single spool system), or was connected to a power turbine that rotated by the exhaust emitted from the high pressure spool (a multi-spool system).
  • Advantages of using a single spool system include faster responses to transient conditions in the system, and the synchronous speed generator may be used to start the gas turbine engine. Disadvantages may include a reduction in output capacity when ambient temperatures increase, and when the grid frequency decreases.
  • Advantages of using a typical multi-spool system include less reduction in output capacity when ambient temperatures increase, and better response to changes in grid frequencies.
  • a typical multi-spool generator configuration includes a three stage gas turbine. The three turbine stages are typically equally loaded such that one and a half of the stages power the turbine compressor, and the remaining one and a half stages outputs power to the generator.
  • the exemplary embodiments of multi-spool systems described below include the use of a variable speed generator connected to a high pressure spool, and a second generator (synchronous or variable speed) connected to a power turbine that increase the effectiveness and efficiency of the systems.
  • An advantage in using a variable speed generator in the multi-spool system is that for a three stage gas turbine, one an a half stages may be used to drive the compressor, a stage may be used to drive a first generator, and the remaining half stage may be used to drive a variable speed generator. Therefore, it is practical and cost effective for a single spool configuration and a multi-spool to share very similar turbine stage designs.
  • FIG. 1 illustrates an exemplary embodiment of a multi-spool generator system 100 .
  • the system 100 includes a gas turbine engine 102 having a compressor 104 , a combustor 106 , and a high pressure turbine (high pressure spool) 108 .
  • a power turbine spool (low pressure spool) 110 is connected to a first generator 112 (The first generator 112 may be a synchronous generator or a variable speed generator.) via a first shaft 114 .
  • a variable speed generator 116 is connected to the compressor 104 via a second shaft 118 .
  • the first generator 112 and the variable speed generator 116 are electrically connected to a grid 120 .
  • variable speed generator 116 and/or the first generator 112 may in some embodiments be electrically connected to a secondary power source 122 , such as, for example, a diesel generator or other type of power source appropriate for powering the generators in a gas turbine starting sequence.
  • a secondary power source 122 such as, for example, a diesel generator or other type of power source appropriate for powering the generators in a gas turbine starting sequence.
  • variable speed generator 116 may also send power to the grid 120 .
  • the variable speed generator 116 may be powered by the grid 120 or the secondary power source 122 . A detailed exemplary starting sequence is described below.
  • FIG. 2 illustrates a block diagram of an exemplary method for starting the system 100 (of FIG. 1 ). Similar methods may be used to start other exemplary embodiments of the systems described below.
  • the high pressure spool 108 and the low pressure spool (power turbine) 110 are rotated using, for example, a turning gear. The rotation of the turning gear prepares the system 100 for startup.
  • the turning gear is disengaged, and the variable speed generator 116 rotates the high pressure spool to purge speed.
  • the variable speed generator 116 may be powered by the grid 120 , or in some embodiments, the secondary power source 122 . Once the purge is complete, the variable speed generator 116 rotates the high pressure spool 108 to combustion speed in block 206 .
  • the variable speed generator 116 is rotated to match a grid synchronization speed by the high pressure spool 108 in block 210 .
  • the variable speed generator 116 is synchronized with the grid 120 to provide power to the grid 120 .
  • the low pressure spool 110 is rotated with the first generator 112 to grid synchronization speed. The exhaust flow emitted from gas turbine engine 102 powers the low pressure spool 110 .
  • the first generator 112 is synchronized electrically to the grid 120 in block 216 .
  • power is output to the grid.
  • FIG. 3 illustrates an alternate exemplary embodiment of the system 100 .
  • FIG. 3 includes a system 300 having a steam turbine 302 that may be connected to the first generator 112 via a third shaft 304 to mechanically assist the rotation of the first generator 112 .
  • FIG. 4 illustrates another alternate exemplary embodiment of the system 100 that is similar to the embodiment illustrated in FIG. 3 .
  • the system 400 of FIG. 4 includes an additional mechanical load 402 that is connected to the first generator 112 via the shaft 304 .
  • FIG. 5 illustrates yet another alternate exemplary embodiment of the system.
  • the system 500 includes an outer shaft 502 that connects the first generator 112 to the power turbine 110 .
  • the variable speed generator 116 is connected to the high pressure spool 108 of the gas turbine engine 102 via an inner shaft 504 aligned concentrically to, and disposed within, the outer shaft 502 .
  • FIG. 6 illustrates another alternate exemplary embodiment that is similar to the system 500 .
  • the system 600 includes an outer shaft 602 that connects the variable speed generator 116 to the high pressure spool 108 .
  • the first generator 112 is connected to the power turbine 110 via an inner shaft 604 aligned concentrically to, and disposed within, the outer shaft 602 .
  • FIG. 7 illustrates an alternate exemplary embodiment of the system 100 that may be combined with any of the embodiments described above.
  • the system 700 includes a second combustor 702 that receives the output exhaust from the gas turbine engine 102 and further heats the exhaust using combustion. The heated exhaust is output by the second combustor 702 to the power turbine 110 .
  • FIG. 8 illustrates yet another alternate exemplary embodiment of the system 100 that may be combined with any of the embodiments described above.
  • the system 800 includes a second combustor 802 that receives the output exhaust from the first high pressure turbine stage 108 and further heats the exhaust using combustion. The heated exhaust is output by the second combustor 802 to a second high pressure turbine stage 804 that is connected to the high pressure spool 108 .
  • the embodiments described above offer systems and methods for multi-spool systems that offer advantages of single spool and multi-spool systems using variable speed generators.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Control Of Turbines (AREA)
  • Control Of Eletrric Generators (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
US12/424,025 2009-04-15 2009-04-15 Systems involving multi-spool generators and variable speed electrical generators Expired - Fee Related US8164208B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US12/424,025 US8164208B2 (en) 2009-04-15 2009-04-15 Systems involving multi-spool generators and variable speed electrical generators
JP2010089090A JP2010249134A (ja) 2009-04-15 2010-04-08 多スプール発電機を伴うシステム
EP10159634.4A EP2241725B1 (fr) 2009-04-15 2010-04-12 Système avec turbine à gaz, une turbine de puissance et premier et second générateurs
CN2010101675260A CN101915128B (zh) 2009-04-15 2010-04-15 包括多转子发电机的***

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12/424,025 US8164208B2 (en) 2009-04-15 2009-04-15 Systems involving multi-spool generators and variable speed electrical generators

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US20100264655A1 US20100264655A1 (en) 2010-10-21
US8164208B2 true US8164208B2 (en) 2012-04-24

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Country Status (4)

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US (1) US8164208B2 (fr)
EP (1) EP2241725B1 (fr)
JP (1) JP2010249134A (fr)
CN (1) CN101915128B (fr)

Cited By (12)

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US9366182B2 (en) 2013-12-06 2016-06-14 Rolls-Royce Corporation Integrated electrical power and thermal management system
US20160356171A1 (en) * 2014-03-14 2016-12-08 Hitachi, Ltd. Gas Turbine Power Generation System
US9695740B2 (en) 2015-07-14 2017-07-04 Ford Global Technologies, Llc Methods and systems for boost control
US9771165B2 (en) 2015-06-25 2017-09-26 Pratt & Whitney Canada Corp. Compound engine assembly with direct drive of generator
US9890697B2 (en) 2016-05-20 2018-02-13 Ford Global Technologies, Llc Method and system for boost pressure control
US10024226B2 (en) 2016-05-20 2018-07-17 Ford Global Technologies, Llc Method and system for boost pressure control
US10024227B2 (en) 2016-05-20 2018-07-17 Ford Global Technologies, Llc Method and system for boost pressure control
US10590842B2 (en) 2015-06-25 2020-03-17 Pratt & Whitney Canada Corp. Compound engine assembly with bleed air
US10696417B2 (en) 2015-06-25 2020-06-30 Pratt & Whitney Canada Corp. Auxiliary power unit with excess air recovery
US10710738B2 (en) 2015-06-25 2020-07-14 Pratt & Whitney Canada Corp. Auxiliary power unit with intercooler
US10815882B2 (en) 2015-10-20 2020-10-27 Nuovo Pignone Tecnologie Srl Integrated power generation and compression train, and method
US11391209B2 (en) * 2018-11-30 2022-07-19 Rolls-Royce Plc Gas turbine engine

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US20120158712A1 (en) 2010-12-16 2012-06-21 Sushrut Karanjkar Inferring Geographic Locations for Entities Appearing in Search Queries
US8723349B2 (en) * 2011-10-07 2014-05-13 General Electric Company Apparatus for generating power from a turbine engine
JP5639568B2 (ja) * 2011-11-15 2014-12-10 三菱日立パワーシステムズ株式会社 ２軸式ガスタービン
ITFI20120161A1 (it) * 2012-08-03 2014-02-04 Nuovo Pignone Srl "dual-end drive gas turbine"
DE112012006770B4 (de) * 2012-08-03 2019-05-09 Hitachi, Ltd. Zweiwellengasturbinen-Stromerzeugungssystem und Steuervorrichtung und Steuerverfahren für ein Gasturbinensystem
ITFI20120245A1 (it) * 2012-11-08 2014-05-09 Nuovo Pignone Srl "gas turbine in mechanical drive applications and operating methods"
JP6130131B2 (ja) * 2012-12-06 2017-05-17 三菱日立パワーシステムズ株式会社 ２軸式ガスタービンの制御装置及びそれを備えた２軸式ガスタービン
US9257838B2 (en) * 2012-12-17 2016-02-09 Ge Aviation Systems Llc Circuit and method for allocating power among generators
WO2014130148A1 (fr) * 2013-02-24 2014-08-28 Rolls-Royce Corporation Groupe motopropulseur à cycle mixte
US10156150B2 (en) 2013-03-14 2018-12-18 United Technologies Corporation Gas turbine engine stator vane platform cooling
JP6248124B2 (ja) * 2013-11-27 2017-12-13 株式会社日立製作所 再生可能エネルギー対応ガスタービンおよびその制御方法
WO2016098266A1 (fr) * 2014-12-19 2016-06-23 Hitachi, Ltd. Système de génération d'énergie à turbine à gaz et système de commande employé dans celui-ci
FR3106620B1 (fr) * 2020-01-24 2024-06-28 Psa Automobiles Sa Systeme thermodynamique de production d’energie comportant deux turbomachines presentant chacune un arbre de transmission
AU2021268906A1 (en) * 2020-05-04 2022-12-08 Nuovo Pignone Tecnologie - S.R.L. Gas turbines in mechanical drive applications and operating methods thereof
CN112696269A (zh) * 2020-11-18 2021-04-23 靳普 多转子微型燃气轮机及其启动方法

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9366182B2 (en) 2013-12-06 2016-06-14 Rolls-Royce Corporation Integrated electrical power and thermal management system
US20160356171A1 (en) * 2014-03-14 2016-12-08 Hitachi, Ltd. Gas Turbine Power Generation System
US9982555B2 (en) * 2014-03-14 2018-05-29 Hitachi, Ltd. Gas turbine power generation system
US10696417B2 (en) 2015-06-25 2020-06-30 Pratt & Whitney Canada Corp. Auxiliary power unit with excess air recovery
US9771165B2 (en) 2015-06-25 2017-09-26 Pratt & Whitney Canada Corp. Compound engine assembly with direct drive of generator
US11584539B2 (en) 2015-06-25 2023-02-21 Pratt & Whitney Canada Corp. Auxiliary power unit with intercooler
US9994332B2 (en) 2015-06-25 2018-06-12 Pratt & Whitney Canada Corp. Engine assembly with direct drive of generator
US10710738B2 (en) 2015-06-25 2020-07-14 Pratt & Whitney Canada Corp. Auxiliary power unit with intercooler
US10501200B2 (en) 2015-06-25 2019-12-10 Pratt & Whitney Canada Corp. Engine assembly for an auxiliary power unit
US10590842B2 (en) 2015-06-25 2020-03-17 Pratt & Whitney Canada Corp. Compound engine assembly with bleed air
US9695740B2 (en) 2015-07-14 2017-07-04 Ford Global Technologies, Llc Methods and systems for boost control
US10815882B2 (en) 2015-10-20 2020-10-27 Nuovo Pignone Tecnologie Srl Integrated power generation and compression train, and method
US10024227B2 (en) 2016-05-20 2018-07-17 Ford Global Technologies, Llc Method and system for boost pressure control
US10677145B2 (en) 2016-05-20 2020-06-09 Ford Global Technologies, Llc Method and system for boost pressure control
US10502122B2 (en) 2016-05-20 2019-12-10 Ford Global Technologies, Llc Method and system for boost pressure control
US10024226B2 (en) 2016-05-20 2018-07-17 Ford Global Technologies, Llc Method and system for boost pressure control
US9890697B2 (en) 2016-05-20 2018-02-13 Ford Global Technologies, Llc Method and system for boost pressure control
US11391209B2 (en) * 2018-11-30 2022-07-19 Rolls-Royce Plc Gas turbine engine

Also Published As

Publication number Publication date
CN101915128A (zh) 2010-12-15
EP2241725A3 (fr) 2012-10-10
CN101915128B (zh) 2013-06-19
JP2010249134A (ja) 2010-11-04
US20100264655A1 (en) 2010-10-21
EP2241725B1 (fr) 2014-04-02
EP2241725A2 (fr) 2010-10-20

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